Protonated Dipeptide Losses from b 5 and b 4 Ions of Side Chain Hydroxyl Group Containing Pentapeptides
نویسندگان
چکیده
منابع مشابه
Collision-Induced Dissociation of Deprotonated Peptides. Relative Abundance of Side-Chain Neutral Losses, Residue-Specific Product Ions, and Comparison with Protonated Peptides.
High-accuracy MS/MS spectra of deprotonated ions of 390 dipeptides and 137 peptides with three to six residues are studied. Many amino acid residues undergo neutral losses from their side chains. The most abundant is the loss of acetaldehyde from threonine. The abundance of losses from the side chains of other amino acids is estimated relative to that of threonine. While some amino acids lose t...
متن کامل157 nm photodissociation of dipeptide ions containing N-terminal arginine.
Twenty singly-charged dipeptide ions with N-terminal arginine were photodissociated using 157 nm light in both a linear ion-trap mass spectrometer and a MALDI-TOF-TOF mass spectrometer. Analogous to previous work on dipeptides containing C-terminal arginine, this set of samples enabled insights into the photofragmentation propensities associated with individual residues. In addition to familiar...
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The enzyme pgalactosidase from a mutant strain of A. niger UV-5 was partially purified using ammonium sulfate and acetone. The saturation range of 60-80% ammonium sulfate was found to yield 60.5% enzyme recovery with 2.4 fold purification. Acetone precipitation at enzyme: acetone ratio of 1 : 1.5 brought about a higher yield i.e. 68% and three-fold purification. The combined procedures of ...
متن کاملthe investigation of the relationship between type a and type b personalities and quality of translation
چکیده ندارد.
Oligopeptide Transport in Escherichia coli SPECIFICITY WITH RESPECT TO SIDE CHAIN AND DISTINCTION FROM DIPEPTIDE TRAKSPORT*
A lysine auxotroph of Escherichia coli W can use lysine oligopeptides as a source of the required amino acid. A mutant, defective in oligopeptide transport, was isolated from this strain with the use of resistance to the bactericidal action of triornithine as a selection procedure. The triornithine-resistant mutant could no longer grow upon lysine oligopeptides. In an analogous manner a triorni...
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ژورنال
عنوان ژورنال: Journal of The American Society for Mass Spectrometry
سال: 2013
ISSN: 1044-0305,1879-1123
DOI: 10.1007/s13361-013-0694-x